Process of treating brittle vegetable fibers.



whole those of the group of UTE EMIL GUSTAV STARK, OF GHEININITZ, GERMANY.

rnocnss or rnnn'rme No Drawing. Application filed December BRITTLE VEGETABLE FIBERS.

20, 1909. Serial No. 534,197,

To all whom it may concern:

Be it known that I, EMIL GUs'rAv STARK, Kommerzienrat, a subject of the King of Saxony, and resident of Chemnitz, Saxony, Germany, have invented a new an use process of'treating'brittle vegetable fibers, (fibers of capoke, akone, (vegetable silk,) Galotrojn's procem, and the like,) for making them ada and for enabling them by a special process to be worked u for yarns and twines.

A number fibers (such as those of capoke, akone, Galotropis proce'r'a, and on the Asclepias, and the like) which possess a liancy and are well mostly qualified as vegetable silks, are in the natural state, as well known, too brittle for beingadapted for um- This succeeds in treatin formly dyeing and spinning; Now it is known that these fibers may e their brittleness when certain so to speak, insubstances' (essentially of. an orare taken away from them. the fibers by some organic dissolvents suc as, for instance, ether, acetone, carbonic disulfid, benzin, benzol, and homologous means. The dissolved substances, and also the dissolvent, may be re ained at the same time. above mentioned substances may also be extracted bymeans of weak alkaline solutions of Turkey-red, or also by soapy liquors at a heating'of 60 to nearly 100 centlgrades suds, tannins, (according to the nature 0 the fibers). 4

The last mentioned solutions may be recrusting, ganlc nature ted for dyeing and spinning beautiful brilfreed from ained and used repeatedly. ber is then washed out with water and dried at a moderate tem erature, and is in the dried state adapted or uniformly dyeing and spinning, and it may then be worked up to yarns and twines by a special process on machines especially adapted therefor. I

Having now described my invention what I claim is fibers, such as those of capoke, akone, Galotropis procem, and the like, for dyeing and spinning, consisting in treating the fibers with 'organicdissolvents', washing with water, and drying at a moderate temperature for working up the fibers to yarns and pecially adapted therefor. V

v 2. A process of treating brittle vegetable fibers as mentioned, consisting in extracting the incrusting substances of the fibers by a weak alkaline solution of Turkey-red, or soapy liquors, or suds, or tannins, at a respective degree of heating, washing with water, and drying at a moderatetem'perature, for working up the fibers thus treated machines especially adapt therefor.

In witness whereof I have hereunto set my hand in the presence of wltnesses.

' EMIL GUSTAV STARK.

Witnesses:

WILLIAM J. KAUJn'rsNY, WM. WASHINGTON BRUNSWICK, J OHANNES BENNDORF.

' The extracted twines by a special process on machines es- Specification of Letters Patent. Patented June 21, 1910.

1. Aprocess of treating brittle vegetable to yarns'and twines by a special process on V 

